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Optimum temperatures for carbon deposition during integrated coal pyrolysis-tar decomposition over low-grade iron ore for ironmaking applications

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Optimum temperatures for carbon deposition during integrated coal pyrolysis−tar decomposition over low-grade iron ore for ironmaking applications.pdf678.92 kBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/54927

Title: Optimum temperatures for carbon deposition during integrated coal pyrolysis-tar decomposition over low-grade iron ore for ironmaking applications
Authors: Cahyono, Rochim B. Browse this author
Yasuda, Naoto Browse this author
Nomura, Takahiro Browse this author →KAKEN DB
Akiyama, Tomohiro Browse this author →KAKEN DB
Keywords: Tar decomposition
Optimum temperature
Carbon deposition
Innovative ironmaking
Issue Date: Mar-2014
Publisher: Elsevier science bv
Journal Title: Fuel processing technology
Volume: 119
Start Page: 272
End Page: 277
Publisher DOI: 10.1016/j.fuproc.2013.11.006
Abstract: Deposited carbon within low-grade iron ore which was produced using integrated coal pyrolysis and tar decomposition showed high reactivity as a reducing agent. However, pyrolysis and tar decomposition were both highly sensitive to temperature and exhibited contrasting behaviors during carbon deposition. In these experiments, the optimum temperatures for pyrolysis and tar decomposition were determined to obtain maximum carbon deposition. High-temperature pyrolysis generated large amounts of volatile matter (tar and gases), which caused high tar decomposition and produced larger deposited carbon and gases. The deposited carbon was major product of tar decomposition at lower temperatures (400-600 degrees C), whereas mainly gases were produced at higher temperatures (700-800 degrees C), because of carbon gasification. The highest amount of deposited carbon was obtained at a pyrolysis temperature of 800 degrees C and a tar decomposition of 600 degrees C. Hamersley ore gave higher amounts of deposited carbon than Robe-river ore because of its large pore size of less than 4 nm, which was suitable for carbon deposition. The pore size distribution was a more important factor than the surface area. Based on these results, the proposed system could achieve maximum carbon deposition and solve problems related to reducing agents, tar materials, and the use of expensive materials in the ironmaking industry. (C) 2013 Elsevier B.V. All rights reserved.
Type: article (author version)
URI: http://hdl.handle.net/2115/54927
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 秋山 友宏

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